Unix
Commands -
A
quick reference to commonly used unix
commands .
- Solaris
Network Configuartion -
Simplified
: Quick reference to setting up network in
Solaris system
- Performance
Monitoring - iostat , vmstat &
netstat - Introduction
to performance monitoring tools with
example and command syntax.
- crontab
in Unix
- A
Quick Reference to setting up and using
cron jobs in unix .
- Veritas
Volume Manager-1:
- Using
vxdiskadm to add & manage disks
& disk groups .
- Veritas
Volume Manager-2:
- Using
vxassist to create ,configure &
manage volumes .
- Admin's
Guide to Solstice Disk Suite:
Complete practical reference including
root mirroring and trouble shooting.
- Securing
Solaris :
- A few
suggestions to make your Solaris system
secure from internal and external
intrusion.
-
- Solaris
Installation
- Step by
step guide to Solaris Installation.
- Jumpstart
Server
- Network
installation of Solaris over one or
multiple systems.
- Booting
Process
- Details of
Solaris booting process.
- Booting
Problems in Solaris
- Common
booting related error messages and their
possible solution
- DNS
Server
- Setting up
DNS server
- Trouble
Shooting DNS Some
of the configuration and nslookup related
errors explained.
- NIS+
- Server ,
Clients setup and commands.
- OpenBoot
Parameters
- Reference
table of important parameters and their
values.
- Solaris
Error Messages
- Alphabetical
listing of common Solaris Error Messages
and their explanation
- Checking
& Repairing File systems with fsck
fsck
operation ,syntax and explanation of some
common error messages
- Vi
Quick Reference
- vi basics
for reference
- explanations.
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Directory
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, Solaris
Administration
- Sun.com
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-
-
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History and timeline ,
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of the UNIX
- Microsoft
Windows NT Server 4.0 versus UNIX
- Overview
of Unix Commands
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for advance Users ,
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Bourne Shell Guide with Ksh ,
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Shell
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reference Guide,
- :
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Documentation
- Solaris
7 System Administration Collection
- Solaris
8 System Administrator Collection
- Solaris
9 System Administartion Collection
- Creating
Solaris Packages
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Solaris
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System Handbook
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Hardware Info.
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Home
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Shared Memory
:
shared memory is a memory segment created by by a process . Other processes can attach to this memory segment and access to the data contained in the segment , subjected to permissions.
Intimate Shared Memory : When a shared memory segment is made into an ISM segment, the memory for the segment is locked. The kernel resources used for memory segment are now shared between all
processes attaching to the segment in ISM . This enables faster I/O and improves memory usage.
SNMP
Simple Network Management
Protocol
is an application layer protocol that facilitates the exchange of
management information between network devices such as routers, computer
hosts & printers. more
about snmp
Dot
pitch & DPI
Dot pitch -
Measured in millimeters , generally referred to the distance between
each pixel on a color screen. Technically it refers to the distance
between the holes of the shadow mask in a CRT display .Smaller the
measurement the better
the display. Commonly used dot pitches are 0.27 & 0.28
Dpi : Dots per inch, is a common measure of
printer or scanner quality which counts how many individual, distinct dots
the printer/scanner can output/input in linear
inch . Higher dpi means better quality.
SE,
HVD, LVD SCSI interfaces
- Single Ended interface drives each signal line against ground & is susceptible to noise and has short length.
High Voltage Differential interface drives two lines for each SCSI signal. One line is the inverse of the other line and the SCSI signal is the difference and hence term differential.
Low Voltage Differential uses 3.3 volt logic which is 5V in HVD. Maximum cable lenth supported are from 1.5 to 6 meter in SE , 25 meters in HVD & 12 Meters in LVD.
A multimode LVD device will automatically switch between LVD and single-ended operation by detecting whether the other devices on the chain are running in SE or LVD mode. SE & LVD are not electrically compatible to HVD due to voltage difference.
CIDR : Classless Inter-Domain Routing
- the notation often used instead of writing the subnet mask along with ip-address . It has network prefix at the end of a address as / number of network bits.This means that the IP address 192.200.20.10 with the subnet mask 255.255.255.0 can also be expressed as 192.200.20.10/24. The /24 indicates the network prefix length, which is equal to the number of continuous binary one-bits in the subnet mask (11111111.11111111.11111111.000000). Zeros are for addressing the hosts on this network.
Priority Paging : Priority paging parameter in pre Solaris 8 versions allows file system cache in the memory to be paged out first leaving application and data in the memory . Free memory is used for caching file system in Pre Solaris 8 versions and paging in such cases sometimes led to paging out of application & data , making application experience a page-in page-out time delay.Solaris 8 keeps file cache isolated so it is not required there. This can be enabled in pre solaris 8 versions by adding line "set priority paging=1" in /etc/system. Remove this line if upgrading from Solaris 7 to 8 & retaining old /etc/system file.
FSSTABLE : File System Stable state flag. The file system is (or was) mounted but has not changed since the last checkpoint (sync or fsflush) that normally occurs every 30 seconds. The kernel periodically checks if a file system is idle and, if so, flushes the information in the superblock back to the disk and marks it as FSSTABLE. If the system crashes, the file system structure is stable, but users might lose a small amount of data. File systems that are marked as FSSTABLE can skip the checking before mounting. The mount command will not mount a file system for read and write access if the file system state is not FSCLEAN, FSSTABLE, or FSLOG in case of logging file system
umask - is the filter which determines the default file and directory permissions at the time of their creation . It is represented by 3 octal values representing permissions to be denied by default .First value is for user ,second for group and third for others permission .Default is 022 and set in /etc/profile .Current value can be seen by typing umask at command prompt
Dynamic System Domains - the ability to create multiple (Solaris) systems within a single Enterprise 10000 chassis. The components which form a domain (system boards, CPU, memory and
i/o) are electrically isolated from other domains to provide the protection between applications running in different domains. The hardware within domains can be reconfigured under software control to meet fluctuating demands of applications running within the domains of an Enterprise 10000
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